Water-Caused Erosion in River Rocks
![Image: Water-Caused Erosion in River Rocks](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/EnvironmentalTopics_EnvironmentalDegradation_00045.jpg?itok=uexLOnO8)
Detailed Description
Rocks uncovered by a drought and a lower level of the Potamac River, at the Chesapeake and Ohio Canal National Historical Park, Maryland. The holes in the center rock are caused by circulating water holding a smaller rock or pebble up against the large rock, and the resulting friction eroding a "pothole," into the larger rock.
Sources/Usage
Public Domain.